Have you looked at Fastcap Kaisen foam? Price has jumped just a bit over the last year but a 2'x4' sheet of 7/8" is currently ~$25US and 1-1/8" is ~$30US. You should should be able to cut 2 inserts out of a sheet.
Not sure of any other similar foam around that has the same or better price but if others out there have some suggestions that'd be great. I'm in the market for some foam in a few months when I finally upgrade my box. I used it often and it holds up very well.
V/R
Bogie
I believe they ship via mail. https://www.foambymail.com/


